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Joined: Apr 2010
Posts: 152
L - Learner Plates On
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L - Learner Plates On
Joined: Apr 2010
Posts: 152 |
This is the factory original setup on my 2009 +4. Already "optimised" with some added washers, so the bolt is not protruding over the nut like on Rog's car. ![[Linked Image]](https://www.tm-img.com/images/2021/07/07/IMG_1580.jpg)
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Joined: May 2012
Posts: 1,639 Likes: 20
Talk Morgan Enthusiast
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OP
Talk Morgan Enthusiast
Joined: May 2012
Posts: 1,639 Likes: 20 |
That's better. I think the brackets would need to be removed/slackened off to first get the bolts in. Rog, perfect! What about to temper and forge the bracket to make it flexible, similar to the rear spring leaves? Then, it would not bend and keep its shape after a collision? I don't know, would it be possible to temper and forge the original, or necessary to use another kind of steel? Or maybe to form it from an old leave? Anyway, many thanks for the excellent idea, I am going to replace the bolts on my Mog as well. What a lovely idea but alas I’m not sure. The bumper bracket is already a spring and by adding a valve spring between the blade and bracket would mean the two springs working in series. I think both would see the same force so the main spring/bracket would still deflect the same  But a thicker section bracket might help  ![[Linked Image]](https://dl.dropboxusercontent.com/s/g27hhelq99eqhcn/bump-brkt.jpg) Thanks Peter. I would speculate that the bracket is already made from a low quality grade of spring steel. I don't think that it is regular ductile mild steel. Also when I was hit the bracket wasn't damaged. The material didn't yield, it sprung back and recovered. Yes heat treatments or a better grade may possibly extend the yield point even further but I think Morgan have done a reasonable job with the current bracket at protecting the delecate chassis. But it is just a shame those nuts and bolts were the way they were...
Roger 2011 Plus 4
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Joined: Aug 2019
Posts: 674 Likes: 81
Talk Morgan Regular
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Talk Morgan Regular
Joined: Aug 2019
Posts: 674 Likes: 81 |
Countersunk screws are a great idea in this situation. Taping over the hex portion to prevent crud getting in might help for ease of subsequent screw removal.
Chris
2015 Plus 4 Silverlake Blue (2014 3.7 Roadster Crystal Blue) (2012 4/4 Sport Black)
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Joined: May 2017
Posts: 1,529 Likes: 37
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2017
Posts: 1,529 Likes: 37 |
I have been waiting but cant hold my breath any longer, what about a little pad of Dave W material on top of Rogers mod to spread the load even more? I too have suffered the same problem, parked at LeMans in the Vinmog group, as the first there we were at the front row and a Belgian? DH coupe was seen parked hard behind me on a slope at lunch time. When we came to leave the circuit (last out) the damage was noted. Never did see that car again...(no note) so when I eventually get round to fixing the damage this mod will be employed.
99 plus 8 indigo
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Joined: Apr 2010
Posts: 152
L - Learner Plates On
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L - Learner Plates On
Joined: Apr 2010
Posts: 152 |
Rog, did you measure/try - is the bracket hole diameter large enough for M10 or will I need to enlarge? The original screw size of 3/8 is around 0,96mm, so asking before ordering. Thanks Peter Thanks Richard  Re the screw size. They are M8 x 70’s (and long enough for my rack brackets too). I have ordered up some M10’s but they are still in the post so will probably stay with these. I also countersunk a couple of M12 stainless washers so that the heads seat nicely and still work in the slots in the brackets
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Joined: May 2012
Posts: 1,639 Likes: 20
Talk Morgan Enthusiast
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OP
Talk Morgan Enthusiast
Joined: May 2012
Posts: 1,639 Likes: 20 |
Yes M10's fitted through the slots in my brackets, I did try a bolt first that I had laying around. Also I ordered up M10’s x 75lg as the nuts and washers are a tad thicker compared to the M8’s
Roger 2011 Plus 4
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